JPH109888A - Route guide apparatus, portable communication terminal and route data calculator used therein - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a route guide system capable of easily receiving route guide service by carrying a small-sized communication terminal by a user. SOLUTION: A starting point, a passing area and a destination are designated to a route data calculation apparatus from a portable communication terminal carried by a user (S12) and route data are calculated by the route data calculation apparatus (S34). The calculated route data are transmitted to the portable communication terminal (S36) to be stored (S14). The stored route data are compared with the present position data of the user calculated by the present position detection function provided to the portable communication terminal and, if necessary, guide data are calculated to be outputted to the user by a sound (S20).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a route guidance system for sequentially instructing a user to a destination using a portable communication terminal, and a portable communication terminal and a route information calculating device used for the same. .

[0002]

2. Description of the Related Art Conventionally, a so-called car navigation system has been known as a system for detecting a current position and guiding a route to a destination. Basic functions of this car navigation system include a current position detection function, a route search function, a route guidance function, and the like.

As a current position detection technology, GPS (Glob
al Positioning System (satellite positioning system) is used. The configuration of a general car navigation system is shown in the block diagram of FIG. The signals from three or more GPS satellites in orbit around the earth are received by the antenna 100, and the GPS signal processing unit 101 measures the arrival time of the signal from each satellite to calculate the distance to the satellite. The current position is estimated from the positions of the satellites and the distance to the satellites. The direction sensor 102 detects the direction of the vehicle. The current position information including the current position estimated by the GPS signal processing unit 101 and the azimuth detected by the azimuth sensor 102 is sent to the navigation computer 103, and based on the current position information, relevant map information is stored in a CD-ROM. CD-ROM in player 104
, The map included in the map information is displayed on the display 105, and the current position is sequentially plotted on the displayed map.

The route search function calculates the recommended route from the current position to the destination set by the user in the navigation computer 103 based on the map information stored in the CD-ROM in the CD-ROM player 104. The recommended route is plotted on a map displayed on the display 105.

[0005] The route guidance function, when moving along the recommended route calculated by the route search function, at the intersection,
When the vehicle is approaching a branch point or the like, guidance information such as the intersection, the distance to the branch point, and the branch direction is output from the speaker 106 by voice, or is displayed on the display in an easily understandable manner.

[0006]

However, in order to realize the route search function and the route guidance function as described in the prior art, a large amount of map information stored in a CD-ROM or the like is required. A CD-ROM player for that is indispensable. In addition, due to the demand for more detailed map information (types of roads such as national roads and prefectural roads, road width information, presence / absence of one-way traffic, landmarks along roads, etc.), the increase of map information data -It is necessary to keep ROM. For this reason, devices for car navigation systems tend to be large, and it is difficult to provide devices having functions equivalent to those of conventional car navigation systems to users who walk or cycle.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and a system in which a user can acquire guidance information to a designated destination by simply carrying a small portable communication terminal. The purpose is to provide.

[0008]

To achieve this object, a route guidance system according to a first aspect of the present invention communicates between a portable communication terminal carried by a user and a route information calculation device. Performing a route guidance to the user to the destination, the mobile communication terminal, the current position detection means for detecting the current position of the user, and transmitted from the route information calculation device Receiving means for receiving the route information, route information storing means for storing the received route information, and guide information calculating means for calculating the guide information based on the stored route information and the current position detected by the current position detecting means And output means for outputting the calculated guidance information, wherein the route information calculation device includes a map information storage means storing map information, a position information of a destination designated in advance, and the map information storage means. Based on the 憶 the map information comprises path information calculating means for calculating the route information, and transmission means for transmitting the route information calculated by the route information calculation unit to the mobile communication terminal.

According to this route guidance system, the route information calculating means calculates route information to the destination based on the position information of the destination designated in advance and the map information stored in the map information storing means. Then, the calculated route information is transmitted to the portable communication terminal by the transmission means of the route information calculation device. In the portable communication terminal, the path information calculated by the path information calculation means and transmitted by the transmission means is received by the reception means and stored in the path information storage means. Guidance information is calculated by the guidance information calculation means based on the current position information detected by the current position detection means in the portable communication terminal and the route information stored in the route information storage means, and the guidance information is output from the output means. Is done.

The route guidance system according to claim 2, wherein the output means synthesizes voice for guidance based on the guide information, and a speaker which outputs synthesized voice. And Therefore, the voice synthesis means synthesizes the guidance information calculated by the guidance information calculation means as a voice for route guidance, and outputs the voice from the speaker.

A portable communication terminal used in the route guidance system according to a third aspect of the present invention includes a current position detecting means for detecting a current position of a user, and a position information and a map information of a destination designated in advance. A receiving unit that receives the route information calculated and transmitted by the route information calculating device based on the route information, a route information storage unit that stores the received route information,
The information processing apparatus includes guidance information calculation means for calculating guidance information based on the stored route information and the current position detected by the current position detection means, and output means for outputting the calculated guidance information.

The route information calculated and transmitted by the route information calculating device based on the position information and the map information of the destination designated in advance is received by the receiving means of the portable communication terminal and stored in the route information storing means. You. Based on the current position information detected by the current position detecting means and the route information stored in the route information storing means, the guide information calculating means calculates the guide information, and the calculated guide information is output by the output means. You.

[0013] The portable communication terminal according to claim 4 is
The output means includes voice synthesis means for synthesizing voice for guidance based on the guide information, and a speaker for outputting synthesized voice. Therefore, the voice synthesis means synthesizes the guidance information calculated by the guidance information calculation means as a voice for route guidance, and outputs the voice from the speaker.

Further, the route information calculating device used in the route guidance system according to the fifth aspect of the present invention includes a map information storing means for storing map information, a position information of a destination designated in advance, and the map information storing means. Route information calculating means for calculating route information based on the stored map information; and a route information calculating device-side transmitting means for transmitting the route information calculated by the route information calculating means to the portable communication terminal. .

The route information calculating means calculates route information to the destination based on the position information of the destination designated in advance and the map information stored in the map information storing means, and transfers the calculated route information to the route. The information is transmitted to the portable communication terminal from the transmission unit of the information calculation device.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 2 and 3 show an embodiment in which the system of the present invention is implemented using a public telephone line as communication means.

In the route guidance system according to the present embodiment, a user carries a portable communication terminal 10. Mobile communication terminal
10 is a mobile phone unit 30 corresponding to the function of a conventional mobile phone,
2 with the position / direction detection unit 20 that detects the position / direction of the user
Consists of three parts.

The mobile phone section 30 transmits / receives radio waves to / from a base station on a public line, a transmission signal to be transmitted from the mobile phone antenna 42, and a reception signal received by the mobile phone antenna 42. A high-frequency signal processing unit 31 for processing, a multiplexed signal processing unit 32 for multiplexing signals and restoring the multiplexed signal, a voice processing unit 33 for modulating a voice signal / demodulating the voice signal into a voice signal, and outputting voice A speaker 34, a microphone 35 for converting sound into an electric signal, a ROM 39 storing a program for controlling the entire mobile communication terminal 10, a CPU 38 for executing a control program, a RAM 40 storing various parameters for control, and a mobile communication terminal 10. It is composed of a display 36 for displaying the status and the like, and a keyboard 37 for inputting the telephone number of the other party.

The position and orientation detection unit 20 includes a GPS antenna 44 for receiving a signal from a GPS satellite, a GPS signal processing unit 21 for processing the received signal and calculating current position information, and a direction sensor for detecting the direction of the user. 22 and is connected to the mobile phone unit 30 via the BUS 41.

For example, it is assumed that the portable telephone unit 30 is a portable telephone using a PHS (Personal Handy Phone System). The voice of use is converted into an electric signal by the microphone 35 and input to the voice processing unit 33. In the audio processing unit 33, the signal is converted into a digital signal by 32 kbit / s ADPCM (Adaptive Differential Pulse Code Modulation). The audio signal converted into a digital signal is converted into a TDMA (Time Division Multipl
e Access) and TDD (Time Division Duplex), and are multiplexed through the high-frequency signal processing unit 31 to the mobile phone antenna 42.
Sent from Conversely, the radio signal received by the mobile phone antenna 42 is input to the multiplexed signal processing unit 32 through the high frequency signal processing unit 31. The input signal is restored to a digital audio signal by the multiplexed signal processing unit 32,
Is input to The audio processing unit 33 demodulates the digital audio signal into an analog audio signal, and outputs the demodulated audio signal from a speaker.

In the position and orientation detection unit 20, signals from three or more GPS satellites in orbit around the earth are received by the GPS antenna 44. The signal from the GPS satellite includes the position of the satellite and the transmission time of the signal, and the GPS signal processing unit 21 calculates the distance to each satellite from the transmission time from each satellite and the time received by the GPS antenna 44, From the calculated positions and distances of three or more satellites, the position of the GPS antenna 44, that is, the position information of the user carrying the mobile communication terminal 10, is calculated at intervals of one second to several tens of seconds. Latitude and longitude are calculated as the current position information. The moving direction and moving speed of the user can be calculated by sequentially calculating the difference between the positions calculated at intervals of one second to several tens of seconds.

In the embodiment of the portable communication terminal, the position and orientation detecting section 20 comprising the GPS antenna 44 and the GPS signal processing section 21 and the direction sensor 22 corresponds to the current position detecting means of the present invention. A part of the storage area of the RAM 40 corresponds to the route information storage means, and the guidance information calculation program in the ROM 39 and the CPU 38 executing the program correspond to the route information calculation means. The mobile phone antenna 42, the high-frequency signal processing unit 31, and the multiplexed signal processing unit 32 correspond to a receiving unit of the mobile communication terminal, and the voice synthesizing unit 43, the voice processing unit 33, and the speaker 34 correspond to an output unit of the mobile communication terminal. .

On the other hand, the route information calculating device 50 of the present embodiment
A public line connection interface 51 for connecting to a public telephone line 80, an audio processing unit 52 for modulating an audio signal / demodulating to an audio signal, a speaker 53 for outputting audio, a microphone 54 for converting audio to an electric signal, ROM 59 storing a program for controlling the entire route information calculating device 50, a CPU 58 for executing a control program, a RAM 60 for storing various parameters for control, and storing map information to be referred to when calculating route information. Hard disk and CD-R for
External storage device 55 composed of OM etc., route information calculation device
The display is composed of a display 56 and a keyboard 57 for the administrator or the operator who performs the management of the operation 50 to perform the operation, and each is connected by the BUS 65.

The program for calculating the route information is R
It is stored in the OM 59 or the external storage device 55. The location information of the destination of the user is temporarily stored in the RAM 60. The route information is calculated based on the location information of the destination designated by the user and the map information.

If the user wants to reach a destination through a certain route, the user can
To the route information calculation device, and inform the operator of the route information calculation device of the departure place, the passing point, and the destination. The operator inputs the departure point, the pass point, and the destination to the route information calculation device 50 I do. The input starting point, passing point, and destination are converted into an internal expression (for example, expression by latitude / longitude) indicating the position of each point with reference to the map information stored in the external storage device 55, and the RAM 60 is used. Is stored temporarily.

Alternatively, if a unique code is assigned to a departure place, a passing point, a destination, etc. in advance without the intervention of an operating operator, the user can start the code from the keyboard 37 of the portable communication terminal 10. By inputting a place, a passing point, and a destination, it is also possible to input a starting point, a passing point, and a destination. In this case, the code of the user's departure place, passage point, and destination is sent through the public line 80. The transmitted code of the departure point, the passing point, and the destination of the user is obtained by referring to the map information stored in the external storage device 55 and using an internal expression indicating the position of each point (for example, latitude / longitude). ) And temporarily stored in the RAM 60.

The map information (positions of roads in each place, types of national roads, prefectural roads, etc., roads, CPU 58 executes the route information calculation program stored in the ROM 59 or the external storage device 55 with reference to the Is calculated. The route information includes information on important points on the route from the departure point to the destination (position information (for example, latitude / longitude) of important points such as junctions, intersections, target buildings, parks, etc. And the like for identifying). The calculated route information is sent to the public line 80 through the public line connection interface 51.

In the embodiment of the route information calculation device, the external storage device 55 composed of a hard disk, a CD-ROM or the like corresponds to a map information storage means, and is stored in the ROM 59 or the external storage device 55. The program and the CPU 58 executing the program correspond to route information calculating means for calculating route information.
1. The public line 80, the base station 90, the base station antenna 91, and the like correspond to the transmitting means.

The route information calculated by the route information calculating device 50 and sent to the public line 80 is multiplexed by the base station 90,
It is transmitted from the base station antenna 91 to the portable communication terminal 10 carried by the user. The signal received by the mobile phone antenna 42 of the mobile communication terminal 10 is processed by the high-frequency signal processing unit 31 and the multiplexed signal processing unit 32 and stored in the RAM 40 as path information.

The CPU 38 executes the guidance information calculation program in the ROM 39 by referring to the current position information detected by the position and orientation detection unit 20 in the portable communication terminal 10 and the route information stored in the RAM 40 to provide guidance. Information is calculated.
The calculated guidance information is converted into voice for route guidance in the voice synthesis unit 43. For example, when the user reaches an intersection where the user should make a right turn, guidance information such as “turn right” is calculated, and a voice signal such as “Please turn right at this intersection” is synthesized. The synthesized audio signal is output as audio from the speaker 34 through the audio processing unit 33.

The route information calculated in the route information calculating device 50 and sent to the portable communication terminal 10 and stored in the RAM 40 is shown in FIG.
It has a data structure as shown in Route information data
Numeral 70 is arranged in the order of departure place, transit place 1, transit place 2... Transit place n, and destination, and each has position information, attribute information, and operation information. The position information contains the latitude and longitude values of the point. The attribute information includes the type (three-way intersection, four-way intersection, five-way intersection ..., park, building name, etc.) relating to the point. The motion information includes what action the user should take at that point. For example,
If the attribute of the point is a three-way intersection, information on actions to be taken by the user, such as “go right” / “go left”, is included.

FIG. 1 shows the flow of route guidance in the route guidance system. If a user wants to get to a destination from a departure point through a transit point,
The user issues a connection request from the mobile communication terminal 10 to the route information calculation device 50 (S10). Upon receiving the connection request from the mobile communication terminal 10, the route information calculation device 50 connects the mobile communication terminal 10 (S30). After the user connects, the route information calculation device 50
To set the departure point, destination, and passing point to
2). For example, a request is issued to the operator of the route information calculation device to input the departure place, destination, and passing point to the route information calculation device 50.

The operating operator inputs a designated destination, a passing point, and a destination from an input / output terminal including a keyboard 57 and a display 56 of the route information calculation device 50, and stores the RAM in the RAM.
It is stored in 60 (S32). The CPU 58 refers to the map information stored in the external storage device 55 based on the position information of the starting point, the passing point, and the destination temporarily stored in the RAM 60.
Executes the route information calculation program stored in the ROM 59 or the external storage device 55 to calculate the route information (S34).
The calculated route information is transmitted to the public line connection interface 51.
To the public line 80, multiplexed by the base station 90, and transmitted from the base station antenna 91 to the portable communication terminal 10 carried by the user (S36). The signal received by the mobile phone antenna 42 of the mobile communication terminal 10
1. Processed by the multiplexed signal processing unit 32, and R
It is stored in the AM 40 (S14). After storing the route information, the connection between the mobile communication terminal 10 and the route information calculating device 50 is released (S16, S38).

The portable communication terminal 10 starts route guidance (S18). The guidance information calculation program in the ROM 39 is referred to by referring to the current position information detected by the position and orientation detection unit 20 in the mobile communication terminal 10 and the route information stored in the RAM 40.
The process is executed in U38, guidance information is calculated as necessary, and the speech information is converted into speech for route guidance in the speech synthesis unit 43 and output as speech (S20). Arrive at destination (S22)
Thereafter, the route guidance ends (S24).

FIG. 5 shows the flow of processing of the portable communication terminal 10 after the start of route guidance. G from GPS satellite signal
The received signal is received by the PS antenna 44, and the received signal is processed to calculate current position information (S60). The calculated current position information is compared with the route information stored in the RAM 40 (S6).
1) It is determined whether or not guidance information needs to be calculated (S62). For example, when the current position of the user is within a radius of several tens of meters from the departure point, the transit point, or the destination, it is determined whether or not the guidance information needs to be calculated. If it is determined that it is necessary, guidance information is calculated (S63). If the passage point i is an intersection, it is determined that it is necessary to guide the user what action to take at this intersection, and guidance information such as "turn right" and "go straight" is calculated. The calculated guidance information is converted into voices such as "Please turn right at the next intersection" and "Please go straight at the next intersection" and output (S64). It is determined whether the current position of the user overlaps the destination (S6).
5) If they overlap, it is determined that the vehicle has arrived at the destination, and the route guidance ends.

However, if it is determined that the vehicle has not arrived at the destination, the process proceeds to S60. If it is determined in S62 that it is not necessary to calculate the guide information, the process proceeds to S65.
The processing moves to.

FIG. 6 shows a flow of processing of the route information calculation device 50. The user inputs the information of the departure place, the passing point, and the destination to the route information calculating device 50 through the portable communication terminal 10 (S80). The route information is calculated based on the input information of the departure point, the passing point, and the destination by referring to the map information and the like stored in the external storage device 55 (S81). The calculated route information is transmitted to the mobile communication terminal 10 (S
82).

Hereinafter, a description will be given using a simple example. FIG.
Suppose that a user wants to move from Park A to Hotel B via Intersection C and Intersection D, as shown in (1). The user informs the route information calculation device that he or she will travel to the B hotel via the above route. The user connects the mobile communication terminal to the route information calculation device by making a call from the mobile communication terminal to the route information calculation device having a telephone number assigned in advance, and through the operation operator on the route information calculation device side. The information of the departure point, the passing point, and the destination, such as moving to the B hotel via the C intersection and the D intersection, is input to the route information calculation device. After the input of the information of the departure place, the passing point, and the destination is completed, the route information calculating device calculates the route information, and transmits the calculated route information to the portable communication terminal carried by the user. The route information is received and stored by the portable communication terminal carried by the user. The route information is stored, the connection with the route information calculation device is released, and route guidance is started.

When the user moves, the current position information of the user and the stored route information are compared every 1 to several tens of seconds. When the user approaches the C intersection in FIG. 7, guidance information such as "need to turn left at the C intersection" is calculated, converted into voice information such as "Please turn left at the next intersection", and output. Follow the guidance and turn left.
When moving toward the intersection, there is no need to turn at the E intersection, so the route guidance device calculates guidance information such as "go straight at the intersection", which is converted to voice information such as "Please go straight to the next intersection" and output. Is done. Similarly, when the user approaches the D intersection, the route guidance is given by voice saying "Please turn right at the next intersection". When the user turns right at the D intersection and goes straight ahead to approach the destination B hotel, the voice information is similarly converted to voice information "about 200 m ahead B hotel" and output. When the user arrives at the destination, the voice is output as "arrival at the destination" and the route guidance ends.

Further, the user has previously specified the departure place, the transit place, and the destination, and has set the departure place, the transit place, and the destination via the operator. Can be set, and the route information calculating device can automatically search for a route. In this case, the route search program is stored in the ROM 59 or the external storage device 55 in the route instruction device 50, and the route search program is executed in the CPU 58.
The route is automatically searched by referring to the map information stored in the external storage device 55, and the searched route is stored in the RAM 60. If the user sets conditions such as the shortest distance route and the minimum number of left / right turns in addition to the use start position and destination, it is also possible to search for and set the optimal route according to the set conditions. It is.

[0042]

As is apparent from the above description, according to the route guidance system according to the first aspect of the present invention, the route information calculation device uses the position information of the destination designated in advance and the map information storage means. Based on the map information stored in
The route information calculating means calculates route information to the destination, and transmits the calculated route information to the portable communication terminal from the transmitting means. The route information transmitted from the route information calculation device is received by a receiving unit in the portable communication terminal, and is stored in the route information storage unit. The guide information calculating means calculates the guide information based on the current position information detected by the current position detecting means in the portable communication terminal and the route information stored in the route information storage means, and the guide information is output from the output means. You. Therefore, instead of carrying the function of calculating the route information to the user's destination, the route information calculation device is provided,
By carrying a small portable communication terminal, a user can receive route guidance to a destination designated in advance.

Further, according to the route guidance system of the second aspect, the output means outputs the information based on the guidance information.
The voice synthesizing means for synthesizing voice for guidance and the speaker for outputting synthesized voice are provided, so that the guidance information calculated by the guidance information calculating means is used for route guidance by the voice synthesizing means. Synthesized as the voice of
The sound can be output from the speaker. Therefore, the user can easily obtain the guide information in an easily understandable state.

According to the portable communication terminal of the present invention, the route information calculated and transmitted by the route information calculating device based on the position information and the map information of the destination designated in advance is transmitted to the portable communication terminal. It is received by the receiving means in the terminal and stored in the route information storage means. The guide information is calculated by the guide information calculating means based on the current position information detected by the current position detecting means and the route information stored in the route information storage means, and the guide information is output from the output means. Can easily obtain guidance information from a portable communication terminal to be carried.

Further, according to the portable communication terminal of the fourth aspect, the output unit outputs a synthesized voice based on the guide information, and a synthesized voice. Since the speaker is provided, the guidance information calculated by the guidance information calculation means can be synthesized as voice for route guidance by the voice synthesis means, and output as voice from the speaker. Therefore, the user can easily obtain the guide information in an easily understandable state.

Further, the route information calculating device according to a fifth aspect of the present invention provides a route information calculating unit that determines a route to a destination based on positional information of a destination designated in advance and map information stored in the map information storing unit. Is calculated, and the calculated route information is transmitted to the mobile communication terminal by the transmission unit of the route information calculation device. Therefore, the mobile communication terminal carried by the user does not have a function of calculating the route information. Also, guidance information can be easily obtained.

Further, since the route information is stored in the portable communication terminal, it is not necessary to connect the portable communication terminal and the route information calculating device while receiving the route guidance, so that the communication cost can be reduced. Can also.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a flow of route guidance in a system according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating an electrical control configuration of the mobile communication terminal.

FIG. 3 is a block diagram illustrating an electrical control configuration of the route information calculation device.

FIG. 4 is a schematic diagram showing a data structure of route information.

FIG. 5 is a flowchart showing a flow of processing in the mobile communication terminal.

FIG. 6 is a flowchart showing a flow of processing in the route information calculation device.

FIG. 7 is a schematic diagram showing an example of route guidance by the route guidance system.

FIG. 8 is a block diagram showing a configuration of a conventional car navigation system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Mobile communication terminal 20 Position / azimuth detection part 30 Mobile telephone part 38 CPU 39 ROM 40 RAM 50 Route information calculation device 55 External storage device 58 CPU 59 ROM 80 Public line 90 Base station

Claims (5)

[Claims] 1. Communication between a portable communication terminal carried by a user and a route information calculation device for calculating route information to a designated destination, and guidance of a route to the designated destination to the user. A route guidance system that performs the following: the portable communication terminal includes: a current position detection unit that detects a current position of a user; a reception unit that receives the route information transmitted from the route information calculation device; Route information storage means for storing route information; guide information calculation means for calculating guide information based on the stored route information and the current position detected by the current position detection means; output for outputting the calculated guide information Means for calculating the route information, the map information storage means storing map information, and the location information of the destination designated in advance and the map information stored in the map information storage means. A route information calculating means for calculating the route information; and a transmitting means for transmitting the route information calculated by the route information calculating means to the portable communication terminal. 2. The apparatus according to claim 1, wherein the output unit includes a voice synthesizing unit that synthesizes a voice for guidance based on the guide information, and a speaker that outputs the synthesized voice. Item 2. The route guidance system according to item 1. 3. A communication is performed between a portable communication terminal carried by a user and a route information calculating device for calculating route information to a designated destination, and a route to the designated destination is specified to the user. A portable communication terminal used in a route guidance system for performing guidance, a current position detection means for detecting a current position of a user, and calculating the route information based on position information and map information of a destination designated in advance. A receiving unit that receives the route information calculated and transmitted by the device; a route information storage unit that stores the received route information; and, based on the stored route information and the current position detected by the current position detecting unit, A portable communication terminal comprising: guidance information calculation means for calculating guidance information; and output means for outputting the calculated guidance information. 4. The apparatus according to claim 1, wherein the output unit includes a voice synthesizing unit that synthesizes a voice for guidance based on the guidance information, and a speaker that outputs the synthesized voice. Item 4. The mobile communication terminal according to item 3. 5. A communication is performed between a portable communication terminal carried by a user and a route information calculating device for calculating route information to a designated destination, and a route to the designated destination is specified to the user. A route information calculation device used in a route guidance system for performing guidance, comprising: a map information storage unit that stores map information; position information of a destination specified in advance; and map information stored in the map information storage unit. A route information calculation device, comprising: route information calculation means for calculating route information based on the information; and transmission means for transmitting the route information calculated by the route information calculation means to the portable communication terminal.